Exploring extra dimensions with cosmic acceleration

          @misc{ scivideos_PIRSA:09030037,
            doi = {10.48660/09030037},
            url = {https://pirsa.org/09030037},
            author = {Wesley, Daniel},
            keywords = {Cosmology},
            language = {en},
            title = {Exploring extra dimensions with cosmic acceleration},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {mar},
            note = {PIRSA:09030037 see, \url{https://scivideos.org/pirsa/09030037}}
          }
          

Abstract

The standard cosmological model features two periods of accelerated expansion: an inflationary epoch at early times, and a dark energy dominated epoch at late times. These periods of accelerated expansion can lead to surprisingly strong constraints on models with extra dimensions. I will describe new mathematical results which enable one to reconstruct features of a higher-dimensional theory based on the behaviour of the accelerating four-dimensional cosmology. When applied to inflation, these results pose several interesting questions for the construction of concrete models. When applied to dark energy, they provide a new technique to combine measurements of dark energy parameters and constraints on variation of Newton's constant. This technique can transform near-future dark energy surveys into become powerful probes of extra dimensional physics.